Rome, 18 June (LaPresse) – The four Iranian underground nuclear facilities that have not yet been attacked ‘will have to be destroyed, either as a result of negotiations or with US assistance to Israel’. This was stated to La Repubblica by David Petraeus, former head of the CIA and Central Command. His suggestion is to ‘use force to compel Tehran to accept the nuclear agreement proposed by the US.’ ‘The more realistic it becomes that the US will help Israel destroy Fordow and the other sites, the more likely Iran will return to the table and accept conditions it rejected before the military campaign,’ he added. As for the possibility of regime change in Tehran, ‘No one would shed a tear if the regime were overthrown, but I don't think the chances of that happening are high,’ he explained. "It is very solid. There are hundreds of thousands of individuals in the security services and millions in the Basij militia. Many others in the inner circle of power have every interest in preserving the regime, and there is no organised internal armed force that can overthrow it," Petraeus concluded.